Give two examples of drift velocity.

Drift velocity refers to the average velocity of particles in a substance in a random motion.

Examples of Drift Velocity

The examples of drift velocity are –

The motion of water molecules.
The motion of electrons under the influence of an electric field in a conductor.

Related Questions

Write Two Differences Between Emf And Potential Difference.
Why Potentiometer Is Preferred Over Voltmeter?
Define: 1 volt, Potential difference.
It is known that the drift velocity of electrons is only a few mm/s for a current of a few amperes. How is it possible that a current is established almost instantaneously when a circuit is closed? For example, a bulb glows as soon as the connection is switched on. Explain.
Two conducting wires X and Y of the same diameter but different materials are joined in series across a battery. If the number density of electrons in X is twice that in Y, find the ratio of the drift velocity of electrons in the two wires.

Read More:

Drift Velocity – Important Topics
Potentiometer	Resistivity Temperature Dependence	Cells, emf, Internal Resistance
Meter bridge	Internal resistance formula	Voltage divider formula
Current density	Power Of Alternating Current	Difference between kva and kw
Voltage	Resistor Colour Codes	Electrical Formula
Ohm’s law	Relation between kva and kw	Resistance Formula
Static Electricity	Power transformers	Difference between AC and DC
Types of Circuits	Ohm’s Law and its Limitations	Derivation of Drift Velocity
Electric Dipole	Difference between RTD and thermocouple	Permittivity And Permeability
Types of Current	Difference between emf and voltage	Cells in Series and in Parallel
Unit of Current	Relation between resistance and length	Unit of Specific Resistance
Resistivity formula	Combination of Resistors	Current density formula
Ampere	Difference between earth and neutral	Types of Resistors
Resistance	Difference Between Primary Cell and Secondary Cell	Current Electricity
EMF Formula	Relation between power and resistance	Wheatstone Bridge
Conductivity	Differences Between Acceleration and Velocity	Electromotive Force
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CBSE CLASS XII Related Questions

1.
Read the following paragraph and answer the questions that follow.
In an experiment with convex lens of focal length f, the screen is fixed at a distance D from the object. A student slowly moves the lens away from the object towards the screen and finds that she is able to form sharp image of the object for two positions of the lens. The distance between these two positions of the lens is d.
2.
Write two advantages of reflecting telescope over refracting telescope.
View Solution
3.
Two air-filled capacitors of capacitances $C_1$ and $C_2$ are connected in parallel with a dc battery. After the capacitors are fully charged, a slab of dielectric constant K is inserted between the plates of each capacitor. How will the (i) charge on each capacitor and (ii) energy stored in the capacitor affected after the slab is introduced.
View Solution
4.
Two metal spheres of radii $r_1$ and $r_2$ ($> r_1$) having charges $q_1$ and $q_2$ respectively kept in air, are brought in contact. Which of the following statements is not correct ?
- The total charge of the two spheres is conserved.
- Both spheres attain the same potential.
- The final potential of the system equals $\frac{1}{4\pi\epsilon_0} \frac{(q_1 + q_2)}{(r_1 + r_2)}$
- The final potential of the system equals $\frac{1}{4\pi\epsilon_0} \frac{(q_1 + q_2) (r_1 + r_2)}{r_1 r_2}$
View Solution
5.
Read the following paragraph and answer the questions that follow.
A p-type or n-type semiconductor can be converted into a p-n junction by doping it with suitable impurity. The motion of majority charge carriers causes diffusion current across the junction while the barrier electric field causes motion of minority carriers for drift current. In case of unbiased diode, the diffusion and drift currents are equal. This equilibrium is disturbed by the biasing batteries. Diodes, therefore, allow currents in one direction. This property of diode is used in making rectifiers.
6.
This ‘average velocity’ is found be few mm/s for currents in range of a few amperes. How then is current established almost the instant a circuit is closed ?
View Solution

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